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Lecture 21

THEATER 10 Lecture Notes - Lecture 21: Extracellular Matrix, Nervous Tissue, Muscle Tissue

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Histology - study of tissues in human body & how tissues are arranged to constitute organs (+
disease detection & diagnosis)
4 fundamental tissues
Epithelial tissue
Connective tissue
Muscular tissue
Nervous tissue
Tissues made up of cells & extracellular matrix.
Extracellular matrix can be present, prominent, or absent.
Extracellular Matrix Functions
Mechanical support to cell
Transport nutrient to cell
Carry out waste product
Protection of cell
o Cell produce extracellular matrix as well as influenced by it.
Many molecules of matrix attach to receptors on cell surfaces.
Formation of Tissue
Formed by arrangement of cells (and cells collectively can create extracellular matrix)
Organs usually contain combo of the 4 tissues, except central nervous (which is formed
solely by nervous tissue)
o Combo of the tissues & how they're arranged determines how they function, behave
(disease) & work together to maintain health.
onnective tissue -- abundance of extracellular material produced by its cell
Muscle -- elongated cell that contracts
Nerve -- elongated process that receive, generate, and transmit nerve pulses.
Most organs can be divided into 2 components:
1. Parenchyma -- cells responsible for main function typical
2. Strome -- supporting tissue
a. Connective tissue
Nervous system does not have connective tissue
Epithelium - covering tissue, also absorbs, filters and secretes.
Distinguish between four tissue groups:
Presence or absence of extracellular matrix
What are the arrangements of tissue groups in relation to major organ systems?
Tissues - group of cells of similar structure that perform a common function
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